This story is revealing of the vaccination rates in Toronto public and Catholic schools which are generally good but seem to show a weakness in the method for getting the job done. Greenwood Secondary has a rate of 50% for diphtheria and 39% for measles, mumps and rubella. It serves a largely immigrant population. Ontario uses a paper book system for parents to record immunization. It is said to be easily misplaced. TDSB only knows who is vaccinated once kids reach school, much later than the mandatory enrolment in public vaccination programs at birth that occurs in Alberta. Metro